U.S. patent application number 16/425975 was filed with the patent office on 2019-12-05 for projecting apparatus.
This patent application is currently assigned to Coretronic Corporation. The applicant listed for this patent is Coretronic Corporation. Invention is credited to Haw-Woei Pan.
Application Number | 20190373227 16/425975 |
Document ID | / |
Family ID | 68693399 |
Filed Date | 2019-12-05 |
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United States Patent
Application |
20190373227 |
Kind Code |
A1 |
Pan; Haw-Woei |
December 5, 2019 |
PROJECTING APPARATUS
Abstract
A projecting apparatus includes an illuminating system and a
first sensing module. The illuminating system includes a light
source module and a filter element. The first sensing module is
disposed beside the filter element, and includes a first light
emitter and a first light sensor. The first light emitter emits a
first sensing light. Outside the transmission path of the light
beam, a first and a second filter regions of the filter element are
sequentially cut into a transmission path of the first sensing
light. When the first filter region is cut into the transmission
path of the first sensing light, the first light sensor generates a
first sensing signal, and when the second filter region is cut into
the transmission path of the first sensing light, the first light
sensor generates a second sensing signal, and the first sensing
signal is different from the second sensing signal.
Inventors: |
Pan; Haw-Woei; (Hsin-Chu,
TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Coretronic Corporation |
Hsin-Chu |
|
TW |
|
|
Assignee: |
Coretronic Corporation
Hsin-Chu
TW
|
Family ID: |
68693399 |
Appl. No.: |
16/425975 |
Filed: |
May 30, 2019 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H04N 9/3114 20130101;
H04N 9/3197 20130101; G02B 26/008 20130101; G03B 21/142 20130101;
H04N 9/3158 20130101; H04N 9/3155 20130101; G03B 33/08 20130101;
G03B 21/204 20130101; H04N 9/3194 20130101; G03B 21/206 20130101;
G02B 5/20 20130101 |
International
Class: |
H04N 9/31 20060101
H04N009/31; G02B 5/20 20060101 G02B005/20; G03B 21/14 20060101
G03B021/14 |
Foreign Application Data
Date |
Code |
Application Number |
Jun 1, 2018 |
CN |
201810557992.6 |
Claims
1. A projecting apparatus, comprising: an illuminating system, a
first sensing module, a light valve, a controller and a projection
lens; wherein the illuminating system comprises a light source
module and a filter element; the light source module is used to
emit a light beam; and the filter element comprises a first filter
region and a second filter region, and the first filter region and
the second filter region are sequentially cut into a transmission
path of the light beam; the first sensing module is disposed beside
the filter element, and the first sensing module comprises a first
light emitter and a first light sensor; the first light emitter is
used to emit a first sensing light, wherein outside the
transmission path of the light beam, the first filter region and
the second filter region are sequentially cut into a transmission
path of the first sensing light; and the first light sensor is used
to detect the first sensing light, wherein when the first filter
region is cut into the transmission path of the first sensing
light, the first light sensor detects the first sensing light and
generates a first sensing signal, and when the second filter region
is cut into the transmission path of the first sensing light, the
first light sensor detects the first sensing light and generates a
second sensing signal, and the first sensing signal is different
from the second sensing signal; the light valve is disposed on the
transmission path of the light beam from the filter element to
modulate the light beam into an image beam; the controller is
respectively electrically connected to the first sensing module,
the filter element and the light valve, and the controller is used
to synchronize the filter element with the light valve by using the
first sensing signal and the second sensing signal; and the
projection lens is disposed on a transmission path of the image
beam.
2. The projecting apparatus according to claim 1, wherein the first
light emitter and the first light sensor are respectively disposed
on two opposite sides of the filter element, when the first filter
region is cut into the transmission path of the first sensing
light, the first sensing light penetrates the first filter region
and is transmitted to the first light sensor, and when the second
filter region is cut into the transmission path of the first
sensing light, the first sensing light does not penetrate the
second filter region.
3. The projecting apparatus according to claim 1, wherein the first
light emitter and the first light sensor are disposed on a same
side of the filter element, when the first filter region is cut
into the transmission path of the first sensing light, the first
sensing light penetrates the first filter region, and when the
second filter region is cut into the transmission path of the first
sensing light, the first sensing light is reflected to the first
light sensor by the second filter region.
4. The projecting apparatus according to claim 1, wherein in the
first sensing signal and the second sensing signal, the signal
intensity of the one with higher signal intensity is a, the signal
intensity of the one with lower signal intensity is b, and the
first sensing signal and the second sensing signal meet
(a-b)/a>20%.
5. The projecting apparatus according to claim 1, wherein the
illuminating system further comprises a wavelength conversion
element, the wavelength conversion element comprises a wavelength
conversion region and a light penetration region, and the
wavelength conversion region and the light penetration region are
sequentially cut into the transmission path of the light beam,
wherein the projecting apparatus further comprises a second sensing
module disposed beside the wavelength conversion element, and the
second sensing module comprises a second light emitter and a second
light sensor; the second light emitter is used to emit a second
sensing light, wherein outside the transmission path of the light
beam, the wavelength conversion region and the light penetration
region are sequentially cut into a transmission path of the second
sensing light; and the second light sensor is used to detect the
second sensing light, wherein when the wavelength conversion region
is cut into the transmission path of the second sensing light, the
second light sensor detects the second sensing light and generates
a third sensing signal, and when the light penetration region is
cut into the transmission path of the second sensing light, the
second light sensor detects the second sensing light and generates
a fourth sensing signal, and the third sensing signal is different
from the fourth sensing signal, wherein the controller is further
electrically connected to the wavelength conversion element and the
second sensing module, the controller is used to synchronize the
filter element, the wavelength conversion element and the light
valve by the first sensing signal to the fourth sensing signal.
6. The projecting apparatus according to claim 5, wherein the
second light emitter and the second light sensor are respectively
disposed on two opposite sides of the wavelength conversion
element, when the light penetration region is cut into the
transmission path of the second sensing light, the second sensing
light penetrates the light penetration region and is transmitted to
the second light sensor, and when the wavelength conversion region
is cut into the transmission path of the second sensing light, the
second sensing light does not penetrate the wavelength conversion
region.
7. The projecting apparatus according to claim 5, wherein the
second light emitter and the second light sensor are disposed on a
same side of the wavelength conversion element, when the light
penetration region is cut into the transmission path of the second
sensing light, the second sensing light penetrates the light
penetration region, and when the wavelength conversion region is
cut into the transmission path of the second sensing light, the
second sensing light is reflected to the second light sensor by the
wavelength conversion region.
8. The projecting apparatus according to claim 1, wherein the first
sensing light comprises at least one of visible light and infrared
light.
9. The projecting apparatus according to claim 1, wherein the
illuminating system further comprises a light homogenizing element
used to homogenize and transmit the light beam from the filter
element to the light valve.
10. A projecting apparatus, comprising: an illuminating system, a
first sensing module, a light valve module, a controller and a
projection lens; wherein the illuminating system comprises a light
source module and a wavelength conversion element; the light source
module is used to emit a light beam; and the wavelength conversion
element comprises a wavelength conversion region and a light
reflection region disposed at a first side thereof, and the
wavelength conversion region and the light reflection region are
sequentially cut into a transmission path of the light beam; the
first sensing module is disposed beside the wavelength conversion
element, and the first sensing module comprises a first light
emitter and a first light sensor; the first light emitter is used
to emit a first sensing light, wherein outside the transmission
path of the light beam, the wavelength conversion region and the
light reflection region are sequentially cut into a transmission
path of the first sensing light; and the first light sensor is used
to detect the first sensing light, wherein when the wavelength
conversion region is cut into the transmission path of the first
sensing light, the first light sensor detects the first sensing
light and generates a first sensing signal, and when the light
reflection region is cut into the transmission path of the first
sensing light, the first light sensor detects the first sensing
light and generates a second sensing signal, and the first sensing
signal is different from the second sensing signal; the light valve
module is disposed on the transmission path of the light beam from
the wavelength conversion element to modulate the light beam into
an image beam; the controller is respectively electrically
connected to the first sensing module, the wavelength conversion
element and the light valve module, and the controller is used to
synchronize the wavelength conversion element with the light valve
module by using the first sensing signal and the second sensing
signal; and the projection lens is disposed on a transmission path
of the image beam.
11. The projecting apparatus according to claim 10, the first light
emitter and the first light sensor are disposed on the first side
of the wavelength conversion element, when the wavelength
conversion region is cut into the transmission path of the first
sensing light, the first sensing light is scattered by the
wavelength conversion region so that the signal intensity of the
first sensing signal detected by the first light sensor is low, and
when the light reflection region is cut into the transmission path
of the first sensing light, the first sensing light is reflected to
the first light sensor by the light reflection region so that the
signal intensity of the second sensing signal detected by the first
light sensor is high.
12. The projecting apparatus according to claim 10, wherein in the
first sensing signal and the second sensing signal, the signal
intensity of the one with higher signal intensity is a, the signal
intensity of the one with lower signal intensity is b, and the
first sensing signal and the second sensing signal meet
(a-b)/a>20%.
13. The projecting apparatus according to claim 10, wherein the
illuminating system further comprises a filter element, the filter
element comprises a first filter region and a second filter region,
and the first filter region and the second filter region are
sequentially cut into the transmission path of the light beam,
wherein the projecting apparatus further comprises a second sensing
module disposed beside the filter element, and the second sensing
module comprises a second light emitter and a second light sensor;
the second light emitter is used to emit a second sensing light,
wherein outside the transmission path of the light beam, the first
filter region and the second filter region are sequentially cut
into a transmission path of the second sensing light; and the
second light sensor is used to detect the second sensing light,
wherein when the first filter region is cut into the transmission
path of the second sensing light, the second light sensor detects
the second sensing light and generates a third sensing signal, and
when the second filter region is cut into the transmission path of
the second sensing light, the second light sensor detects the
second sensing light and generates a fourth sensing signal, and the
third sensing signal is different from the fourth sensing signal,
wherein the controller is further electrically connected to the
filter element and the second sensing module, and the controller is
used to synchronize the filter element, the wavelength conversion
element and the light valve module by the first sensing signal to
the fourth sensing signal.
14. The projecting apparatus according to claim 13, wherein the
second light emitter and the second light sensor are respectively
disposed on two opposite sides of the filter element, when the
first filter region is cut into the transmission path of the second
sensing light, the second sensing light penetrates the first filter
region and is transmitted to the first light sensor, and when the
second filter region is cut into the transmission path of the
second sensing light, the second sensing light does not penetrate
the second filter region.
15. The projecting apparatus according to claim 13, wherein the
second light emitter and the second light sensor are disposed on a
same side of the filter element, when the first filter region is
cut into the transmission path of the second sensing light, the
second sensing light penetrates the first filter region, and when
the second filter region is cut into the transmission path of the
second sensing light, the second sensing light is reflected to the
second light sensor by the second filter region.
16. The projecting apparatus according to claim 13, wherein the
illuminating system further comprises a light homogenizing element
used to homogenize and transmit the light beam from the filter
element to the light valve module.
17. The projecting apparatus according to claim 10, wherein when
the light penetration region is cut into the transmission path of
the light beam, the light beam penetrates the wavelength conversion
element, and when the wavelength conversion region is cut into the
transmission path of the light beam, the light beam is converted
into a converted light beam by the wavelength conversion region,
wherein the light valve module comprises a first light valve and a
second light valve, the illuminating system further comprises a
light splitting module, the light splitting module is disposed on
the transmission path of the light beam and the converted light
beam from the wavelength conversion element, the light splitting
module is used to split the light beam and the converted light beam
into a first light beam and a second light beam as well as
transmitting the first light beam and the second light beam to the
first light valve and the second light valve respectively.
18. The projecting apparatus according to claim 10, wherein the
first sensing light comprises at least one of visible light and
infrared light.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application claims the priority benefit of China
application serial no. 201810557992.6, filed on Jun. 1, 2018. The
entirety of the above-mentioned patent application is hereby
incorporated by reference herein and made a part of this
specification.
BACKGROUND OF THE INVENTION
1. Field of the Invention
[0002] The invention relates to an optical apparatus, in particular
to a projecting apparatus.
2. Description of Related Art
[0003] The imaging principle of the projecting apparatus is that an
illuminating beam generated by an illuminating system is converted
into an image beam by a light valve, and then the image beam is
projected onto a screen through a projection lens to form an image
picture. In order to produce an illuminating beam including
components having three primary colors (red, blue, green), the
illuminating system in the projecting apparatus may include a
phosphor wheel or/and a color wheel. The phosphor wheel or/and the
color wheel may have multiple light conversion regions to convert
light beams from a light source into different color lights at
different time intervals. Therefore, the light valve must be
synchronized with the phosphor wheel or/and the color wheel so that
the light valve modulates the illuminating beam into the image
beam.
[0004] At present, a method for detecting the rotation position of
the phosphor wheel or the color wheel is to attach a black
light-absorbing tape to a specific position on the wheel axle and
arrange a sensing module in the corresponding position. The sensing
module is able to emit a sensing light and receive the reflected
sensing light. When the axle rotates to the specific position, the
sensing light emitted by the sensing module is absorbed by the
light-absorbing tape, so that the sensing signal detected by the
sensing module changes from strong to weak. Therefore, by sensing
the intensity of the signal, the rotation position of the phosphor
wheel or the color wheel, and the rotation speed of the phosphor
wheel or the color wheel can be determined. However, this method
requires the additional sticking of the light-absorbing tape, and
the method of manually sticking the light-absorbing tape makes it
difficult to ensure accuracy and needs additional correction,
thereby increasing production processes and production cost.
[0005] The information disclosed in this Background section is only
for enhancement of understanding of the background of the described
technology and therefore it may contain information that does not
form the prior art that is already known to a person of ordinary
skill in the art. Further, the information disclosed in the
Background section does not mean that one or more problems to be
resolved by one or more embodiments of the invention was
acknowledged by a person of ordinary skill in the art.
SUMMARY OF THE INVENTION
[0006] The invention provides a projecting apparatus with less
production process and production cost.
[0007] In order to achieve one, some, or all of the aforementioned
objectives or other objectives, an embodiment of the invention
provides a projecting apparatus, which includes an illuminating
system, a first sensing module, a light valve, a controller and a
projection lens. The illuminating system includes a light source
module and a filter element. The light source module is used to
emit a light beam. The filter element includes a first filter
region and a second filter region, and the first filter region and
the second filter region are sequentially cut into a transmission
path of the light beam. The first sensing module is disposed beside
the filter element, and the first sensing module includes a first
light emitter and a first light sensor. The first light emitter is
used to emit a first sensing light, wherein outside the
transmission path of the light beam, the first filter region and
the second filter region are sequentially cut into a transmission
path of the first sensing light. The first light sensor is used to
detects the first sensing light, wherein when the first filter
region is cut into the transmission path of the first sensing
light, the first light sensor detects the first sensing light and
generates a first sensing signal, and when the second filter region
is cut into the transmission path of the first sensing light, the
first light sensor detects the first sensing light and generates a
second sensing signal, and the first sensing signal is different
from the second sensing signal. The light valve is disposed on the
transmission path of the light beam from the filter element to
modulate the light beam into an image beam. The controller is
respectively electrically connected to the first sensing module,
the filter element and the light valve, and the controller is used
to synchronize the filter element with the light valve by using the
first sensing signal and the second sensing signal. The projection
lens is disposed on a transmission path of the image beam.
[0008] In order to achieve one, some, or all of the aforementioned
objectives or other objectives, an embodiment of the present
invention provides a projecting apparatus, which includes an
illuminating system, a first sensing module, a light valve module,
a controller and a projection lens. The illuminating system
includes a light source module and a wavelength conversion element.
The light source module is used to emit a light beam. The
wavelength conversion element includes a wavelength conversion
region and a light reflection region disposed at a first side
thereof, and the wavelength conversion region and the light
reflection region are sequentially cut into a transmission path of
the light beam. The first sensing module is disposed beside the
wavelength conversion element, and the first sensing module
includes a first light emitter and a first light sensor. The first
light emitter is used to emit a first sensing light, wherein
outside the transmission path of the light beam, the wavelength
conversion region and the light reflection region are sequentially
cut into a transmission path of the first sensing light. The first
light sensor is used to detect the first sensing light, wherein
when the wavelength conversion region is cut into the transmission
path of the first sensing light, the first light sensor detects the
first sensing light and generates a first sensing signal, and when
the light reflection region is cut into the transmission path of
the first sensing light, the first light sensor detects the first
sensing light and generates a second sensing signal, and the first
sensing signal is different from the second sensing signal. The
light valve module is disposed on the transmission path of the
light beam from the wavelength conversion element to modulate the
light beam into an image beam. The controller is respectively
electrically connected to the first sensing module, the wavelength
conversion element and the light valve module, and the controller
is used to synchronize the wavelength conversion element with the
light valve module by using the first sensing signal and the second
sensing signal. The projection lens is disposed on a transmission
path of the image beam.
[0009] Based on the above, in the projecting apparatus according to
the embodiments of the present invention, the sensing module is
disposed beside the wavelength conversion element or the filter
element, and the sensing light emitted by the sensing module is
sequentially cut into different regions of the wavelength
conversion element or the filter element. Since the sensing module
may detect different sensing signals in the different regions, the
rotation position and rotation speed of the wavelength conversion
element or the filter element can be determined through the
difference of the sensing signals. Thus, the projecting apparatus
according to the embodiments of the invention can detect the
rotation position and rotation speed of the wavelength conversion
element and filter element in a simple and accurate manner without
additionally sticking the light-absorbing tape or performing
additional correction, thereby reducing the production processes
and production cost.
[0010] Other objectives, features and advantages of the present
invention will be further understood from the further technological
features disclosed by the embodiments of the present invention
wherein there are shown and described preferred embodiments of this
invention, simply by way of illustration of modes best suited to
carry out the invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0011] The accompanying drawings are included to provide a further
understanding of the invention, and are incorporated in and
constitute a part of this specification. The drawings illustrate
embodiments of the invention and, together with the description,
serve to explain the principles of the invention.
[0012] FIG. 1 is a schematic view of a projecting apparatus
according to a first embodiment of the invention.
[0013] FIG. 2 is a front schematic view of the wavelength
conversion element in FIG. 1.
[0014] FIG. 3 is a front schematic view of the filter element in
FIG. 1.
[0015] FIG. 4 is a timing diagram of signal intensity sensed by the
first sensing module of FIG. 1.
[0016] FIG. 5 is a timing diagram of signal intensity sensed by the
second sensing module of FIG. 1.
[0017] FIG. 6 is a schematic view of a projecting apparatus
according to another embodiment of the invention.
[0018] FIG. 7 is a timing diagram of signal intensity sensed by the
first sensing module of FIG. 6.
[0019] FIG. 8 is a timing diagram of signal intensity sensed by the
second sensing module of FIG. 6.
[0020] FIG. 9 is a schematic view of a projecting apparatus
according to another embodiment of the invention.
[0021] FIG. 10 is a front schematic view of the wavelength
conversion element in FIG. 9.
[0022] FIG. 11 is a timing diagram of signal intensity sensed by
the second sensing module of FIG. 9.
[0023] FIG. 12 is a schematic view of a projecting apparatus
according to another embodiment of the invention.
[0024] FIG. 13 is a schematic view of a projecting apparatus
according to another embodiment of the invention.
[0025] FIG. 14 is a front schematic view of the filter element in
FIG. 13.
DESCRIPTION OF THE EMBODIMENTS
[0026] In the following detailed description of the preferred
embodiments, reference is made to the accompanying drawings which
form a part hereof, and in which are shown by way of illustration
specific embodiments in which the invention may be practiced. In
this regard, directional terminology, such as "top," "bottom,"
"front," "back," etc., is used with reference to the orientation of
the Figure(s) being described. The components of the present
invention can be positioned in a number of different orientations.
As such, the directional terminology is used for purposes of
illustration and is in no way limiting. On the other hand, the
drawings are only schematic and the sizes of components may be
exaggerated for clarity. It is to be understood that other
embodiments may be utilized and structural changes may be made
without departing from the scope of the present invention. Also, it
is to be understood that the phraseology and terminology used
herein are for the purpose of description and should not be
regarded as limiting. The use of "including," "comprising," or
"having" and variations thereof herein is meant to encompass the
items listed thereafter and equivalents thereof as well as
additional items. Unless limited otherwise, the terms "connected,"
"coupled," and "mounted" and variations thereof herein are used
broadly and encompass direct and indirect connections, couplings,
and mountings. Similarly, the terms "facing," "faces" and
variations thereof herein are used broadly and encompass direct and
indirect facing, and "adjacent to" and variations thereof herein
are used broadly and encompass directly and indirectly "adjacent
to". Therefore, the description of "A" component facing "B"
component herein may contain the situations that "A" component
directly faces "B" component or one or more additional components
are between "A" component and "B" component. Also, the description
of "A" component "adjacent to" "B" component herein may contain the
situations that "A" component is directly "adjacent to" "B"
component or one or more additional components are between "A"
component and "B" component. Accordingly, the drawings and
descriptions will be regarded as illustrative in nature and not as
restrictive.
[0027] FIG. 1 is a schematic view of a projecting apparatus
according to a first embodiment of the invention. FIG. 2 is a front
schematic view of the wavelength conversion element in FIG. 1. FIG.
3 is a front schematic view of the filter element in FIG. 1.
Referring to FIG. 1 first, the projecting apparatus 200 of the
embodiment includes an illuminating system 100, a first sensing
module 210, a second sensing module 220, a light valve 230, a
controller 240 and a projection lens 250. The illuminating system
100 includes a light source module 110, a wavelength conversion
element 120 and a filter element 130. The light source module 110
is used to emit a light beam L1. The wavelength conversion element
120 and the filter element 130 are both disposed on a transmission
path of the light beam L1.
[0028] In the embodiment, the light source module 110 is a laser
light emitting element including at least one laser diode chip. For
example, the light source module 110 may be, for example, a blue
laser diode bank, and the light beam L1 is a blue laser beam, but
the invention is not limited thereto.
[0029] Referring to FIG. 1 and FIG. 2, in the embodiment, the
wavelength conversion element 120 is a rotatable disk-like element,
for example, a phosphor wheel. The wavelength conversion element
120 includes a wavelength conversion region 122 and a light
penetration region 124, and can convert a short wavelength light
beam transmitted to the wavelength conversion region 122 into a
long wavelength light beam. Specifically, the wavelength conversion
element 120 includes a substrate S, the substrate S has the
wavelength conversion region 122 and the light penetration region
124 arranged in an annular shape, a wavelength conversion material
CM is disposed in the wavelength conversion region 122, and the
light penetration region 124 is, for example, a region formed by a
transparent plate embedded in the substrate S or a hollow region
formed in the substrate S. The substrate S is, for example, a
reflective substrate. The wavelength conversion material CM is, for
example, yellow phosphor, which is able to be excited by a blue
light beam and output a yellow light beam. The wavelength
conversion region 122 and the light penetration region 124 are
suitable to rotate around a rotating shaft 126 along with the
wavelength conversion element 120 so as to sequentially cut into
the transmission path of the light beam L1. When the light
penetration region 124 is cut into the transmission path of the
light beam L1, the light beam L1 penetrates the light penetration
region 124 of the wavelength conversion element 120, and when the
wavelength conversion region 122 is cut into the transmission path
of the light beam L1, the light beam L1 is converted into a
converted light beam L2 by the wavelength conversion region 122,
and the converted light beam L2 can be reflected by the substrate S
of the wavelength conversion element 120. The converted light beam
L2 is, for example, a yellow light beam. In other embodiments, the
wavelength conversion element 120 may also include multiple
wavelength conversion regions for respectively converting the light
beam L1 into different color lights.
[0030] Referring to FIG. 1 and FIG. 3, in the embodiment, the
filter element 130 is a rotatable disk-like element, for example a
color filter wheel. The filter element 130 includes a first filter
region 132 and a second filter region 134, and the first filter
region 132 and the second filter region 134 are suitable to rotate
around the rotating shaft 136 along with the filter element 130 so
as to sequentially cut into the transmission path of the light beam
L1 and the converted light beam L2 from the wavelength conversion
element 120. The first filter region 132 includes, for example, a
red light filter region RR and a transmissive region TR. The second
filter region 134 includes, for example, a green light filter
region GR. For example, the transmissive region TR allows light to
pass through, and the red light filter region RR allows the light
beam in a red light wavelength band to penetrate through and filter
out (or reflect) the light beam in other wavelength bands, and so
on. In other embodiments, a diffusion sheet, a diffusion particle
or a diffusion structure is also disposed in the transmissive
region TR and is used to reduce or eliminate the speckle phenomenon
of the light beam L1. In detail, when the converted light beam L2
is transmitted to the red light filter region RR or the green light
filter region GR, the converted light beam L2 is filtered to form a
red light beam or a green light beam. When the light beam L1 is
transmitted to the transmissive region TR, the light beam L1
penetrates the transmissive region TR of the filter element 130,
and is, for example, a blue light beam.
[0031] Referring to FIG. 1, the light valve 230 is disposed on the
transmission path of the light beam L1 (blue light beam) from the
filter element 130 as well as the red light beam and green light
beam formed by filtering by the filter element 130 so as to
modulate the light beam L1 (blue light beam), red light beam and
green light beam into an image beam L3. The projection lens 250 is
disposed on the transmission path of the image beam L3 and used to
project the image beam L3 to a screen (not shown) to form an image
picture. After the light beams of different colors converge on the
light valve 230, the light valve 230 sequentially converts the
light beam L1 (blue light beam), the red light beam and the green
light beam into the image beam L3 with different colors and
transmits the image beam L3 to the projection lens 250, and
therefore, the image picture which is generated from the image beam
L3 converted by the light valve 230 and is projected by the
projection lens 250 can become a colored picture.
[0032] In the embodiment, the light valve 230 is, for example, a
digital micro-mirror device (DMD) or a liquid-crystal-on-silicon
panel (LCOS panel). However, in other embodiments, the light valve
230 may also be a transmissive liquid crystal panel or other
spatial light modulators. In the present embodiment, the projection
lens 250 is, for example, a combination including one or more
optical lenses having diopter, and the optical lens includes, for
example, a biconcave lens, a biconvex lens, a concave-convex lens,
a convex-concave lens, a plano-convex lens, a plano-concave lens,
or other non-planar lenses or various combinations thereof. The
invention does not limit the shape and type of the projection lens
250.
[0033] FIG. 4 is a timing diagram of signal intensity sensed by the
first sensing module of FIG. 1. Referring to FIG. 1 and FIG. 4, the
first sensing module 210 is disposed beside the filter element 130,
and the first sensing module 210 includes a first light emitter 212
and a first light sensor 214. The first light emitter 212 is used
to emit a first sensing light SL1, wherein outside the transmission
path of the light beam L1 and the converted light beam L2, the
first filter region 132 and the second filter region 134 are
sequentially cut into a transmission path of the first sensing
light SL1. The first light sensor 214 is used to detect the first
sensing light SL1, wherein when the first filter region 132 of the
filter element 130 is cut into the transmission path of the first
sensing light SL1, the first light sensor 214 detects the first
sensing light SL1 and generates a first sensing signal, and when
the second filter region 134 of the filter element 130 is cut into
the transmission path of the first sensing light SL1, the first
light sensor 214 detects the first sensing light SL1 and generates
a second sensing signal, and the first sensing signal is different
from the second sensing signal.
[0034] In detail, the first light emitter 212 and the first light
sensor 214 of the embodiment are respectively disposed on two
opposite sides of the filter element 130, the first light emitter
212 is, for example, a laser diode or light emitting diode, and the
first sensing light SL1 is, for example, red light or infrared
light. When the first filter region 132 (for example, the red light
filter region RR and the transmissive region TR) is cut into the
transmission path of the first sensing light SL1, the first sensing
light SL1 penetrates the first filter region 132 and is transmitted
to the first light sensor 214, and at this time, the first light
sensor 214 senses that the signal intensity of the first sensing
signal is high. When the second filter region 134 (for example, the
green light filter region GR) is cut into the transmission path of
the first sensing light SL1, the first sensing light SL1 is
filtered out (or reflected) by the second filter region 134 and
does not penetrate the second filter region 134, and at this time,
the first light sensor 214 senses that the signal intensity of the
second sensing signal is low. For example, when the converted light
beam L2 is transmitted to the green light filter region GR, the
converted light beam L2 penetrates and is filtered to form a green
light beam, and at this time, the red light filter region RR is cut
into the transmission path of the first sensing light SL1 and the
first light sensor 214 generates the first sensing signal. In other
embodiments, the first sensing light SL1 may also be any color
light in the visible light, and the invention is not limited
thereto. For example, the first sensing light SL1 may also be green
light, then the first filter region 132 may include a green light
filter region GR and a transmissive region TR, and the second
filter region 134 may include a red light filter region RR. It
should be noted that the color light allowed to pass through the
respective filter regions of the filter element 130 of the present
embodiment is only exemplary, and is not intended to limit the
invention. The filter element 130 may have other number of filter
regions, and the invention is not limited thereto.
[0035] FIG. 5 is a timing diagram of signal intensity sensed by the
second sensing module of FIG. 1. Referring to FIG. 1 and FIG. 5,
the second sensing module 220 is disposed beside the wavelength
conversion element 120, and the second sensing module 220 includes
a second light emitter 222 and a second light sensor 224. The
second light emitter 222 is used to emit a second sensing light
SL2, wherein outside the transmission path of the light beam L1 and
the converted light beam L2, the wavelength conversion region 122
and the light penetration region 124 are sequentially cut into a
transmission path of the second sensing light SL2. The second light
sensor 224 is used to detect the second sensing light SL2, wherein
when the wavelength conversion region 122 is cut into the
transmission path of the second sensing light SL2, the second light
sensor 224 detects the second sensing light SL2 and generates a
third sensing signal, and when the light penetration region 124 is
cut into the transmission path of the second sensing light SL2, the
second light sensor 224 detects the first sensing light SL1 and
generates a fourth sensing signal, and the third sensing signal is
different from the fourth sensing signal.
[0036] In detail, the second light emitter 222 and the second light
sensor 224 of the present embodiment are respectively disposed on
two opposite sides of the wavelength conversion element 120, the
second light emitter 222 is, for example, a laser diode or light
emitting diode, and the second sensing light SL2 is, for example,
red light or infrared light. When the light penetration region 124
is cut into the transmission path of the second sensing light SL2,
the second sensing light SL2 penetrates the light penetration
region 124 and is transmitted to the second light sensor 224, and
at this time, the second light sensor 224 senses that the signal
intensity of the third sensing signal is high. When the wavelength
conversion region 122 is cut into the transmission path of the
second sensing light SL2, the second sensing light SL2 is reflected
by the substrate S of the wavelength conversion element 120 and
does not penetrate the wavelength conversion region 122, and at
this time, the second light sensor 224 senses that the signal
intensity of the fourth sensing signal is low. For example, when
the light beam L1 is transmitted to the light penetration region
124, the light beam L1 penetrates the light penetration region 124,
and at this time, the wavelength conversion region 122 is cut into
the transmission path of the second sensing light SL2 and the
second light sensor 224 generates the fourth sensing signal. In
other embodiments, the second sensing light SL2 may also be any
color light in the visible light, and the invention is not limited
thereto.
[0037] Wherein, in the first sensing signal and the second sensing
signal, the signal intensity of the one with higher signal
intensity is a1, the signal intensity of the one with lower signal
intensity is b1, and the first sensing signal and the second
sensing signal meet (a1-b1)/a1>20%. In the third sensing signal
and the fourth sensing signal, the signal intensity of the one with
higher signal intensity is a2, the signal intensity of the one with
lower signal intensity is b2, and the third sensing signal and the
fourth sensing signal meet (a2-b2)/a2>20%.
[0038] In the present embodiment, the controller 240 is
respectively electrically connected to the first sensing module
210, the second sensing module 220, the wavelength conversion
element 120, the filter element 130 and the light valve 230, and
the controller 240 synchronizes the wavelength conversion element
120, the filter element 130 and the light valve 230 by the first
sensing signal to the fourth sensing signal from the first light
sensor 214 and the second light sensor 224. Specifically, the
controller 240 may pre-store information about the angles and order
of various regions of the wavelength conversion element 120 and the
filter element 130, and when the wavelength conversion element 120
and the filter element 130 rotate to a specific position, the first
light sensor 214 and the second light sensor 224 may respectively
transmit synchronization signals to the controller 240. The
controller 240 can obtain the rotation speed of the wavelength
conversion element 120 and the filter element 130 by the interval
time of the synchronization signals, and can obtain the rotation
position (the current located region) of the wavelength conversion
element 120 and the filter element 130 by matching the information
about the pre-stored angles and order of regions. Therefore, the
controller 240 may respectively transmit control signals to the
wavelength conversion element 120, the filter element 130 and the
light valve 230 according to the above-mentioned information so as
to synchronize the three.
[0039] Through the above disposition, the projecting apparatus 200
according to the embodiments of the invention can detect the
rotation position and rotation speed of the wavelength conversion
element 120 and filter element 130 in a simple and accurate manner
without additionally sticking the light-absorbing tape or
performing additional correction, thereby reducing the production
processes and production cost.
[0040] In an embodiment, the controller 240 is, for example, a
central processing unit (CPU), a microprocessor, a digital signal
processor (DSP), a programmable controller, a programmable logic
device (PLD) or other similar devices or a combination thereof, and
the invention is not limited thereto. Besides, in an embodiment,
the functions of the controller 240 may be implemented as a
plurality of program codes. These program codes are stored in a
memory, and executed by the controller 240. Alternatively, in an
embodiment, each of the functions of the controller 240 may be
implemented as one or more circuits. The invention is not intended
to limit whether each of the functions of the controller 240 is
implemented by ways of software or hardware.
[0041] In the present embodiment, the illuminating system 100 may
further include a light combining unit 140 and multiple reflecting
mirrors 150. The light combining unit 140 is located between the
light source module 110 and the wavelength conversion element 120,
and located on the transmission path of the light beam L1 emitted
from the light source module 110, the converted light beam L2 and
the light beam L1 penetrating the wavelength conversion element
120. The multiple reflecting mirrors 150 are located on the
transmission path of the light beam L1 penetrating the wavelength
conversion element 120, and are used to transmit the light beam L1
penetrating the wavelength conversion element 120 to the light
combining unit 140. Specifically, the light combining unit 140 may
be a dichroic mirror (DM) or a dichroic prism, and may provide
different optical effects for light beams of different colors. For
example, in the present embodiment, the light combining unit 140
allows, for example, the light beam L1 to penetrate, and reflect
the converted light beam L2. Therefore, the light combining unit
140 may transmit the light beam L1 from the light source module 110
to the wavelength conversion element 120, and after the multiple
reflecting mirrors 150 transmit the light beam L1 penetrating the
wavelength conversion element 120 to the light combining unit 140,
and the light combining unit 140 may combine the converted light
beam L2 reflected from the wavelength conversion element 120 and
the light beam L1 penetrating the wavelength conversion element
120.
[0042] Besides, the illuminating system 100 may further include
multiple lenses 160 and a light homogenizing element 170 disposed
on the transmission path of the light beam L1. The multiple lenses
160 are used for converging, diverging, collimating the light beam
or adjusting the light beam path inside the illuminating system
100. The light homogenizing element 170 is used for homogenizing
the light beam from the filter element 130 and transmitting it to
the light valve 230. In the present embodiment, the light
homogenizing element 170 is, for example, an integration rod, but
is not limited thereto.
[0043] It should be noted here that the following embodiments use
partial content of the foregoing embodiments, and the description
of the same technical content is omitted. For the same component
names, reference may be made to the partial content of the
foregoing embodiments, and the following embodiments are not
described repeatedly.
[0044] FIG. 6 is a schematic view of a projecting apparatus
according to another embodiment of the present invention. FIG. 7 is
a timing diagram of signal intensity sensed by the first sensing
module of FIG. 6. FIG. 8 is a timing diagram of signal intensity
sensed by the second sensing module of FIG. 6. Referring to FIG. 6
first, the projecting apparatus 200a of the present embodiment is
substantially similar to the projecting apparatus 200 in FIG. 1,
and the main difference in architecture lies in the disposition
manner of the first sensing module and the second sensing module.
The first light emitter 212 and the first light sensor 214 in FIG.
1 are respectively disposed on two opposite sides of the filter
element 130, and the second light emitter 222 and the second light
sensor 224 are respectively disposed on two opposite sides of the
wavelength conversion element 120. The first light emitter 212 and
the first light sensor 214 in FIG. 6 are disposed on the same side
of the filter element 130, and the second light emitter 222 and the
second light sensor 224 are disposed on the same side of the
wavelength conversion element 120. It should be noted that the red
light filter region RR (or green light filter region GR) of the
filter element 130 in the present embodiment can allow the light
beam in the red light (or green light) wavelength band to penetrate
and reflect the light beams in other wavelength bands.
[0045] Referring to FIG. 6 and FIG. 7, when the first filter region
132 (for example, the red light filter region RR and the
transmissive region TR) of the filter element 130 is cut into the
transmission path of the first sensing light SL1, the first sensing
light SL1 penetrates the first filter region 132 and is not
transmitted to the first light sensor 214, and at this time, the
first light sensor 214 senses that the signal intensity of the
first sensing signal is low. When the second filter region 134 (for
example, the green light filter region GR) of the filter element
130 is cut into the transmission path of the first sensing light
SL1, the first sensing light SL1 is reflected to the first light
sensor 214 by the second filter region 134, and at this time, the
first light sensor 214 senses that the signal intensity of the
first sensing signal is high. In the embodiment of FIG. 6, the
situation that the first sensing module 210 is disposed on the back
side of the filter element 130 is taken as an example. In other
embodiments, the first sensing module 210 may also be disposed on
the front side of the filter element 130.
[0046] Referring to FIG. 6 and FIG. 8, when the light penetration
region 124 of the wavelength conversion element 120 is cut into the
transmission path of the second sensing light SL2, the second
sensing light SL2 penetrates the light penetration region 124 and
is not transmitted to the second light sensor 224, and at this
time, the second light sensor 224 senses that the signal intensity
of the third sensing signal is low. When the wavelength conversion
region 122 of the wavelength conversion element 120 is cut into the
transmission path of the second sensing light SL2, the second
sensing light SL2 is reflected to the second light sensor 224 by
the substrate S of the wavelength conversion element 120, and at
this time, the second light sensor 224 senses that the signal
intensity of the fourth sensing signal is high. In the embodiment
of FIG. 6, the situation that the second sensing module 220 is
disposed on the back side of the wavelength conversion element 120
is taken as an example. In other embodiments, the second sensing
module 220 may also be disposed on the front side of the wavelength
conversion element 120.
[0047] The first light emitter 212 and the first light sensor 214
of the present embodiment are disposed on the same side of the
filter element 130, and the second light emitter 222 and the second
light sensor 224 are also disposed on the same side of the
wavelength conversion element 120. In other embodiments, the first
light emitter 212 and the first light sensor 214 can be disposed on
the same side of the filter element 130, and the second light
emitter 222 and the second light sensor 224 are disposed on two
opposite sides of the wavelength conversion element 120.
Alternatively, the first light emitter 212 and the first light
sensor 214 can be disposed on two opposite sides of the filter
element 130, the second light emitter 222 and the second light
sensor 224 are disposed on the same side of the wavelength
conversion element 120, and the present invention is not limited
thereto.
[0048] FIG. 9 is a schematic view of a projecting apparatus
according to another embodiment of the invention. FIG. 10 is a
front schematic view of the wavelength conversion element in FIG.
9. FIG. 11 is a timing diagram of signal intensity sensed by the
second sensing module of FIG. 9. The same component names and
component numbers in the present embodiment may refer to partial
content of the foregoing embodiments, and details are not repeated
herein. Referring to FIG. 9 and FIG. 10, in the projecting
apparatus 200b of the present embodiment, a first side (for
example, the front side) of the wavelength conversion element 120b
of the illuminating system 100b includes a wavelength conversion
region 122 and a light reflection region 124b, and the wavelength
conversion region 122 and the light reflection region 124b are
sequentially cut into the transmission path of the light beam L1
from the light source module 110. In the present embodiment, the
light reflection region 124b is, for example, a portion of the
reflective substrate S.
[0049] The second light emitter 222 and the second light sensor 224
of the present embodiment are disposed on the first side (for
example, the front side) of the wavelength conversion element 120b,
when the wavelength conversion region 122 is cut into the
transmission path of the second sensing light SL2 emitted from the
second light emitter 222, the second sensing light SL2 is diffusely
reflected by the wavelength conversion material CM of the
wavelength conversion region 122, so that the second light sensor
224 senses that the intensity of the third sensing signal is low,
and when the light reflection region 124b is cut into the
transmission path of the second sensing light SL2, the second
sensing light SL2 is reflected to the second light sensor 224 by
the light reflection region 124b so that the second light sensor
224 senses that the intensity of the fourth sensing signal is high.
It should be noted that since the reflection of the light in the
light reflection region 124b is close to mirror reflection, the
second sensing light SL2 may be mostly transmitted to the second
light sensor 224 so that the second light sensor 224 can sense the
second sensing light SL2 and generate the fourth sensing signal
with a higher signal intensity. However, the reflection of the
light in the wavelength conversion region 122 is close to diffuse
reflection, and therefore, in comparison with the mirror
reflection, the second light sensor 224 senses the second sensing
light SL2 and generates the third sensing signal with a lower
signal intensity.
[0050] FIG. 12 is a schematic view of a projecting apparatus
according to another embodiment of the present invention. Referring
to FIG. 12, the projecting apparatus 200c of the present embodiment
is substantially similar to the projecting apparatus 200b in FIG.
9. The main difference is that the present embodiment does not have
a filter element, and the light valve module 230c of the present
embodiment includes a first light valve 232c and a second light
valve 234c. Besides, the illuminating system 100c further includes
a light splitting module 180c, the light splitting module 180c is
disposed on the transmission path of the light beam L1 and the
converted light beam L2 from the wavelength conversion element
120b, and the light splitting module 180c is used to split the
light beam L1 and the converted light beam L2 into a first light
beam Le1 and a second light beam Lc2 as well as transmitting the
first light beam Lel and the second light beam Lc2 to the first
light valve 232c and the second light valve 234c respectively.
Specifically, the light splitting module 180c includes, for
example, a light splitting film 182c and multiple prisms 184c. The
light splitting film 182c is located on the surface of one of the
prisms 184c. When the light beam L1 and the converted light beam L2
are transmitted to the light splitting module 180c, the light beam
L1 and the converted light beam L2 undergo total internal
reflection inside the light splitting module 180c so as to be
transmitted to the light splitting film 182c. The light splitting
film 182c is used to split the light beam L1 and the converted
light beam L2 into the first light beam Le1 and the second light
beam Lc2, and transmitting the first light beam Lel and the second
light beam Lc2 to the first light valve 232c and the second light
valve 234c respectively. The first light valve 232c and the second
light valve 234c respectively modulate the first light beam Lel and
the second light beam Lc2 into an image beam L3.
[0051] For example, the light splitting film 182c is, for example,
a dichroic element designed to reflect the green light beam and
allow the blue light beam and the red light beam to pass through.
Therefore, when the light beam L1 and the converted light beam L2
are transmitted to the light splitting film 182c of the light
splitting module 180c, the light beam L1 (for example, the blue
light beam) and the light beam having the red light wavelength band
in the converted light beam L2 may pass through the light splitting
film 182c to form the first light beam Le1, and the light beam
having the green light wavelength band in the converted light beam
L2 is reflected by the light splitting film 182c to form the second
light beam Lc2. In other embodiments, the light splitting film 182c
may also be a dichroic element designed to reflect the red light
beam and allow the blue light beam and the green light beam to pass
through. Therefore, when the light beam L1 and the converted light
beam L2 are transmitted to the light splitting film 182c of the
light splitting module 180c, the light beam L1 (for example, the
blue light beam) and the light beam having the green light
wavelength band in the converted light beam L2 may pass through the
light splitting film 182c to form the first light beam Lc1, and the
light beam having the red light wavelength band in the converted
light beam L2 is reflected by the light splitting film 182c to form
the second light beam La.
[0052] In the present embodiment, the controller 240 is
respectively electrically connected to the second sensing module
220, the wavelength conversion element 120b and the light valve
module 230c, and the controller 240 is used for synchronizing the
wavelength conversion element 120b and the light valve module 230c
by the third sensing signal and the fourth sensing signal.
[0053] FIG. 13 is a schematic view of a projecting apparatus
according to another embodiment of the invention. FIG. 14 is a
front schematic view of the filter element in FIG. 13. Referring to
FIG. 13 and FIG. 14, the same component names and component numbers
in the present embodiment may refer to partial content of the
foregoing embodiments, and details are not repeated herein. The
light source module 110d of the illuminating system 100d of the
projecting apparatus 200d of the present embodiment is, for
example, an ultrahigh pressure mercury lamp (UHP lamp), a metal
halide lamp or a xenon lamp. The first filter region 132d of the
filter element 130d includes, for example, a red light filter
region RR and a transmissive region TR. The second filter region
134d includes, for example, a green light filter region GR and a
blue light filter region BR, so that the color lights having
different wavelength bands in the light beam L1 from the light
source module 110d are filtered out from the filter element
130d.
[0054] The first light emitter 212 and the first light sensor 214
of the present embodiment are disposed on the same side of the
filter element 130d. When the first filter region 132d (for
example, the red light filter region RR and the transmissive region
TR) is cut into the transmission path of the first sensing light
SL1, the first sensing light SL1 penetrates the first filter region
132d and is not transmitted to the first light sensor 214, and at
this time, the first light sensor 214 senses that the signal
intensity of the first sensing signal is low. When the second
filter region 134d (for example, the green light filter region RR
and the blue light filter region BR) is cut into the transmission
path of the first sensing light SL1, the first sensing light SL1 is
reflected to the first light sensor 214 by the second filter region
134d, and at this time, the first light sensor 214 senses that the
signal intensity of the second sensing signal is high. Since the
sensing manner of the first sensing module 210 in the present
embodiment is similar to the sensing manner of the first sensing
module 210 in FIG. 6, for the timing diagram of signal intensity
sensed by the first sensing module 210 of the present embodiment,
reference may be made to the foregoing embodiment, and the
illustration is omitted. In the embodiment of FIG. 13, the
situation that the first sensing module 210 is disposed on the back
side of the filter element 130d is taken as an example. In other
embodiments, the first sensing module 210 may also be disposed on
the front side of the filter element 130d.
[0055] In other embodiments, the first light emitter 212 and the
first light sensor 214 may be respectively disposed on two opposite
sides of the filter element 130d. When the first filter region 132d
(for example, the red light filter region RR and the transmissive
region TR) is cut into the transmission path of the first sensing
light SL1, the first sensing light SL1 penetrates the first filter
region 132d and is transmitted to the first light sensor 214, and
at this time, the first light sensor 214 senses that the signal
intensity of the first sensing signal is high. When the second
filter region 134d (for example, the green light filter region RR
and the blue light filter region BR) is cut into the transmission
path of the first sensing light SL1, the first sensing light SL1 is
filtered out (or reflected) by the second filter region 134d and
does not penetrate the second filter region 134d, and at this time,
the first light sensor 214 senses that the signal intensity of the
first sensing signal is low. Since the disposition manner and
sensing manner of the first sensing module of the present
embodiment are similar to the disposition manner and sensing manner
of the first sensing module in FIG. 1, for the disposition manner
of the first sensing module of the present embodiment and the
timing diagram of signal intensity sensed by the first sensing
module, reference may be made to the foregoing embodiment, and the
illustration is omitted.
[0056] In the present embodiment, the controller 240 is
respectively electrically connected to the first sensing module
210, the filter element 130d and the light valve 230, and the
controller 240 is used for synchronizing the filter element 130d
and the light valve 230 by the first sensing signal and the second
sensing signal.
[0057] Based on the above, in the projecting apparatus according to
the embodiments of the present invention, the sensing module is
disposed beside the wavelength conversion element or the filter
element, and the sensing light emitted by the sensing module is
sequentially cut into different regions of the wavelength
conversion element or the filter element. Since the sensing module
may sense different sensing signals in the different regions, the
rotation position and rotation speed of the wavelength conversion
element or the filter element can be determined through the
difference of the sensing signals. Thus, the projecting apparatus
according to the embodiments of the present invention can detect
the rotation position and rotation speed of the wavelength
conversion element and the filter element in a simple and accurate
manner without additionally sticking the light-absorbing tape or
performing additional correction, thereby reducing the production
processes and production cost.
[0058] The foregoing description of the preferred embodiments of
the invention has been presented for purposes of illustration and
description. It is not intended to be exhaustive or to limit the
invention to the precise form or to exemplary embodiments
disclosed. Accordingly, the foregoing description should be
regarded as illustrative rather than restrictive. Obviously, many
modifications and variations will be apparent to practitioners
skilled in this art. The embodiments are chosen and described in
order to best explain the principles of the invention and its best
mode practical application, thereby to enable persons skilled in
the art to understand the invention for various embodiments and
with various modifications as are suited to the particular use or
implementation contemplated. It is intended that the scope of the
invention be defined by the claims appended hereto and their
equivalents in which all terms are meant in their broadest
reasonable sense unless otherwise indicated. Therefore, the term
"the invention", "the present invention" or the like does not
necessarily limit the claim scope to a specific embodiment, and the
reference to particularly preferred exemplary embodiments of the
invention does not imply a limitation on the invention, and no such
limitation is to be inferred. The invention is limited only by the
spirit and scope of the appended claims. The abstract of the
disclosure is provided to comply with the rules requiring an
abstract, which will allow a searcher to quickly ascertain the
subject matter of the technical disclosure of any patent issued
from this disclosure. It is submitted with the understanding that
it will not be used to interpret or limit the scope or meaning of
the claims. Any advantages and benefits described may not apply to
all embodiments of the invention. It should be appreciated that
variations may be made in the embodiments described by persons
skilled in the art without departing from the scope of the present
invention as defined by the following claims. Moreover, no element
and component in the present disclosure is intended to be dedicated
to the public regardless of whether the element or component is
explicitly recited in the following claims.
* * * * *